Placing passengers in FS 2K2/2K4 aircraft

Greetings from Poland.Does anyone know how to place passengers (or extra passengers) into FS2K2 or 2K4 aircraft? I notice that one of the default Cessnas has a pilot and front seat passenger/co-pilot. I also see various pilot models in different default aircraft. I'd like to fill a Beechcraft Baron, for example, with five passengers to feel the difference in the way it handles. Or simply to place a passenger in the front seat of the Piper Cub from ACOF. Because it can get lonely up there... Is this do-able? Can one cut and paste from the model's code? Do you need extra software for this? Michael Dembinski of Warsaw, Poland